NARRATIVE OF THE CRUISE. 
689 
S. by W. from Observation Islet is another small islet, and on the mainland between 
them there are a few lints on the beach. At the head of Humboldt Bay is a sharp peak 
just inside the coast line, from whence to Point Bonpland the coast is low. Point 
Bonpland is the western extremity of a ridge of hills, about 4 miles long and from 
800 to 1000 feet high, which stretches from that point towards Mount Bougainville, ending 
with a sharp fall over Point Bonpland, off which there are two small islets. Mount 
Bougainville is wrongly placed on the chart; it bears S. 68' E. (true) 17 ’5 miles from 
Point Caillie, and is a sloping mountain 4500 feet above the level of the sea. The 
Cyclops Mountains consist of a long range with one peak considerably higher than the 
others, the position and height of which could not be determined. 
The deposit at 37 fathoms in Humboldt Bay was a greenish mud, containing a few 
Pteropod and Foraminifera shells. The surface organisms did not indicate the presence 
of any large body of river water, being rather pelagic than estuarine. 
Humboldt Bay to the Admiralty Islands. 
The first two days after leaving Humboldt Bay for the Admiralty Islands, light 
westerly winds and fine weather were experienced, after which the wind became variable, 
with squalls, and approaching the Admiralty Islands there was almost continuous rain. 
Matty Island, the Schouten group, and the Hermit Islands were sighted on the passage, and 
one sounding of 1070 fathoms was obtained in lat. 2° 33' S., long. 144° 4 ' E.; a trawling 
and temperatures (see Sheet 31) were also obtained in this position. The deposit was 
a blue mud with a reddish surface layer, and contained 1 7 per cent, of carbonate of lime. 
The trawl brought up a large quantity of mud, large pieces of pumice, fragments of wood 
and fruits, and nearly two hundred specimens of deep-sea animals. The net was covered 
with a branching Rhizopod. 
The Alcyonaria. — The Pennatulida have been noticed on page 49. The other 
Alcyonarian collections were sent to Professor E. Perceval Wright, who is engaged in 
preparing a Report on them ; he writes as follows : — “ The species of the suborder 
Alcyonacea, being for the most part inhabitants of shallow water, were not well repre- 
sented in the collections. Still some interesting species of the genera Xenia, Clavidaria, 
and Nephthya occur, and a few forms of the genus Spoggodes were dredged in depths of 
from 100 to 150 fathoms. A species of Sarcophyton found on the reefs oft’ the shores of 
the Admiralty Islands supplied Professor Moseley 1 with the material for an important 
memoir on the structure of this form, the heteromorphism of which had already been 
discovered by Professor Kolliker. Only a few fragments of Tubipora musica were col- 
lected, and no simple non-colonial forms. 
1 On the Structure of Sarcophyton, Phil. Trans., part i. p. 109, 1876. 
